A 9:1 belt reduction gearbox for NEMA 17 stepper motors with a position sensor to enable accurate positioning and remove any belt stretch.
This enables NEMA 17 steppers to be used as actuators for larger robot arms.

Cad and code are at https://github.com/roTechnic/BeltRedu...

These are the supplies i used:
NEMA 17 stepper: https://amzn.to/3gtK3Qd
Arduino Mega: https://amzn.to/3nx3Oui
5mm steel rod: https://amzn.to/3HMBGeV
Thin wall bearings: https://amzn.to/3gtYLqG
Pulleys and belts: https://amzn.to/3J8N1WE
1.75mm PLA+ filament: https://amzn.to/3HvzVT5